The big difference between negative pressure ambulances and the other two types of ambulances depends on the word "negative pressure" or more. Simply put, the standard air pressure in the car is lower than the external standard air pressure, and the air is always at a high working pressure. The mobility of the area to areas with low work pressure can ensure that the virus infection in the car is not easy to environmentally pollute the outside. In fact, the basic principle of "negative pressure" is very simple, which is often seen and applied by everyone in daily life. For example, everyone uses a plastic straw to drink water. Breathing will cause a bottom pressure zone in the plastic straw, and then the external standard air pressure will put the pressure into everyone's mouth. Another example is the formation of a typhoon. The wind eye is the bottom pressure zone, so the surrounding air is moving towards the wind eye. The size of the wind is the pressure difference.
First of all, what is "negative pressure ambulance", how is it different from general ambulances? There are three types of ambulances A, B, and C. Type A is an ambulance that has basic rescue and medical equipment; Type B is an ambulance. In Type A, it basically improves many rescue equipment, such as charging and drip machines. Equipment, sternum pressure relief equipment, anesthesia machine, defibrillator, etc. Negative-pressure ambulances are classified as type C. The key is to transport patients with high-risk infectious diseases, especially for diseases that can be spread according to the air. In addition to the new type of new coronavirus outbreak, there are also influenza and typhoid. Wait.
Compared with ordinary ambulances, what is the difference between negative pressure ambulances? First, the air in the negative pressure ambulance car is negative pressure, that is, the standard air pressure in the car is lower than all normal atmospheric pressure. In this way, only the air outside the window is allowed to enter under the effect of atmospheric pressure After entering the car, the air in the car will be harmless afterwards, and the sewage will be discharged, with a higher safety factor.
From the perspective of everyone's appearance only, there is not much difference between a negative pressure ambulance and a general ambulance. The key lies in its internal structure. The negative pressure ambulance has a set of negative pressure equipment. The equipment is located in the middle of the car box, which is similar to the smoke and exhaust pipes that can be moved at will. It is different from general ambulances in that it has the function of protecting against airborne diseases.
The standard air pressure in the car will be lower than the standard air pressure outside the window, so air can be lost from the car into the car. The negative pressure equipment will produce a fixed air commodity circulation area. The air flows from top to bottom in the car to ensure that the medical staff get fresh air first, and the air exhaled by the patient is digested and absorbed. The filter device is generally located on the top of the patient's head, which also ensures that the dirty air is acquired at the first time.
The design scheme in the car can also be converted into a more stringent isolation compartment on the stretcher car, and it is also a separate negative pressure machine. The centrifugal fan of this isolation compartment uses a lithium battery power supply system, which can be continuously applied, which increases the number of medical personnel. A guarantee. The air discharged from the separate protective bin directly enters the air filter device to carry out reasonable harmlessness to avoid the harm caused by the harmful air discharge to the outside.
In fact, the larger characteristic of negative pressure ambulances is the ability to "negative pressure protection", and basic ambulances can't do it at this point. Implement emergency solutions for emerging and sudden infectious diseases, including the shipment of patients at risk of infection, reasonable protection, and the harmlessness of the air in the car, to protect the external natural environment from environmental pollution and avoid further pneumonia epidemics External diffusion is the key to the safety protection and shipment of major infectious patients. Especially for this new type of new coronavirus pneumonia epidemic, you must choose this type of negative pressure ambulance in order to reasonably protect the carrier.
It is said that in the end, the addition of negative pressure ambulances has more reasonably maintained the risk of first-line medical workers being infected during the entire process of transporting patients with the pneumonia epidemic in this lung infection. It also more reasonably avoids the environmental pollution caused by opening to the outside world and the spread of virus infection in the lungs during the entire shipping process. Thank you for your participation in the production and processing of negative pressure ambulances, which has shaken the manufacturing staff. You have worked hard! In addition, thank you to the frontline medical workers and all kinds of staff who participated in the frontal battle. You have worked hard! Oil, Wuhan City, Hubei Province, China!
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